Gymnocactus Backeberg, Blatter fur Kakteenforschung (6): [22], 1938

Gymnocactus aguirreanus C. Glass & R.A. Foster, Cact. Succ. J. (U. S. A.), 44 (2): 80., 1972

Gymnocactus beguinii (A. Weber ex K. Schum) Backeberg, Cact & Succ Journ. Amer 23. 151: 1951

Gymnocactus beguinii v. senilis Y. Ito, The Cactaceae: 475, without type, 1981

Gymnocactus beguinii v. smithii (Muehlenpf) Backeberg, Cactaceae (Backeberg) 5: 2855., 1961

Gymnocactus conothelos (Regel & J. Klein) Backeberg, Cactac. Handb. Kakteenk. 5. 2859, 1961

Gymnocactus gielsdorfianus (Werdermann) John and Riha, Monats. Kakt. 215, 1929

Gymnocactus goldii (H. Bravo Hollis.) Y. Ito, The Cactaceae: 475, without basionym ref.: 1981

Gymnocactus horripilus (Lemaire) John and Riha, Cact. Aliq. Nov., 7; 1838

Gymnocactus horripilus v. albispinus 

Gymnocactus horripilus v. robustior

Gymnocactus knuthianus (Boedeker) Backeberg, Cact. & Succ. Journ. Amer. 23. 151, 1951

Gymnocactus mandragora (Fric ex Berger) Zimmerman, Kakteen, 225, 1929;
Bradleya 9: 92, 1991, 1929

Gymnocactus mandragora ssp. beguinii (Weber) J. Lüthy, Schumann, Gesmtb, (Kakteen, 442, 1898) KuaS 50 (11): 279, 1999, 1898

Gymnocactus mandragora ssp. beguinii senilis  

Gymnocactus mandragora ssp. booleanus (Hinton) J. Lüthy, (Phytolgia 80 (1): 62-66, 1996); KuaS 50 (11): 279, 1999, 1996

Gymnocactus mandragora ssp. pailanus (Halda & Panarotto) J. Lüthy, (Acta. Mus. Richnov. Sect. natur, 5: 162, 1998); KuaS 50 (11): 279, 1999, 1998

Gymnocactus mandragora ssp. subterraneus (Backeberg) J. Lüthy, (Kakteenfreund 1: 110-111, 1932); KuaS 50 (11): 279, 1999, 1932

Gymnocactus mandragora ssp. zaragozae (C. Glass and R.A. Foster) J. Lüthy, (CSJ 50 (6): 283, 1978); KuaS 50 (11): 279, 1999, 1978

Gymnocactus roseanus (Boedeker) C. Glass & R. Foster, Cact. & Succ. Journ. Amer. 42. 234, 1970

Gymnocactus roseiflorus G.R.W. Frank, Succulentes (France) 72 (1): 42, 1993

Gymnocactus saueri (Bödecker) John and Riha, (Zeit. Sukk. 16: 362, 1928); Kaktusy 17 (1): 15-18, 1981, 19 (1): 22, 1983, 1981

Gymnocactus saueri ssp. nelissae J.J. Halda & P. Panarotto, Acta. Mus. Richnov. Sect. natur, 5: 161, 1998

Gymnocactus saueri ssp. ysabelae (K. Schlange) J. Lüthy, (CSJ (Am) 5 (10): 551, 1934); KuaS 50 (11): 279, 1999, 1994

Gymnocactus saussieri (A. Weber) Backeberg, Cact. & Succ. Journ. Amer. 23. 151, 1951

Gymnocactus subterraneus (Backeberg) Backeberg, Cact. Journ. Brit. 11. 16, 1951

Gymnocactus subterraneus v. zaragosae C. Glass & R. Foster, Cact. Succ. J. (U. S. A.), 50 (6): 283, 1978

Gymnocactus subterraneus v. zaragozae C. Glass & R.A. Foster., Cact. Succ. J. (U. S. A.), see Glass, Guía Identific. Cact. Amenazadas México, 50 (6): 283, as 'zaragosae'; 1: Tu/za (1998 publ. 1997), 1978

Gymnocactus valdeziana (Moeller) Backeberg  1930

Gymnocactus valdezianus v. albiflorus (Pazout) Backeberg, Kakteenlexikon 163., 1966

Gymnocactus viereckii (Werdermann) John and Riha, (Monatsschrift der DKG 3: 175, 1931); Kaktusy 17 (1): 15-18, 1981, 19 (1): 22, 1983

Gymnocactus viereckii v. major (C. Glass and R.A. Foster) C. Glass, (CSJ 50 (6): 285, 1978); Threatened cacti of México, 1998

Gymnocactus ysabelae (Schlange) Backeberg, Cactac. Handb. Kakteenk. 5. 2856, 1961

Gymnocactus ysabelae v. brevispinus (Schlange) Backeberg, Cactaceae (Backeberg) 5: 2856., 1961